Hollow shaft for centrifugal separators.



C. H. SHAW.

HOLLOW SHAFT FOR GBNTRIPUGAL sBPARAToRs- APPLICATION FILED JAN. 21,1909.

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Patented May 24, 1910.

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HOLLOW SHAFT POR GENTRIPUGAL, SBPARATORS.

AIPLIGATION FILED JAN. 21, 1909.

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HVTTFP/VEYSI UNITED STATES PATENT OFFICE.

CHARLS H. SHAW, OF MILWAUKEE, INISGONSIN, ASSIGNOR TO STANDARD SEPARATORCOMPANY, A CORPORATION OF NEIN JERSEY.

HOLLOW SHAFT FOR CENTRIFUGAL SEPARATORS.

To all whom 'it may concern.'

Be it known that I, CHARLES H. SHAW, residing in Milwaukee, in thecounty of Milwaukee and State of Wisconsin, have invented new and usefulImprovements in Hollow Shafts for Centrifugal Separators, of which thefollowing is a description, reference being had to the accompanyingdrawings, which are a part of this specification.

This invention has for its object to provide a hollow shaft forcentrifugal separators which will be open throughout the main portionthereof so as to be freely accessible for cleaning.

With this object in view the invention comprises a hollow shaft with itsmain portion formed by radial wings which serve the purpose of holdingthe separator disks in place while allowing a free path of travel forthe cream along the outside of the feed tube and being suiicientlyspaced apart to allow of a cleaning cloth being entered between them forcleaning purposes.

The invention further consists in the hollow shaft for centrifugalseparators herein claimed and all equivalents.

Referring to the accompanying drawings in which like characters ofreference indicate the same parts in the different views: Figure 1 is asectional elevation of a sep arator bowl provided with a hollow shaftconstructed in accordance with this invention; Fig. 2 is an elevation ofa hollow shaft with parts broken away; Fig. 3 is a plan view of thehollow shaft inverted; and, Fig. 4 is a sectional plan View on the planeof line 4 4 of Fig. 2.

In these drawings 10 indicates a separator bowl and 11 is the conicalcap which fits thereon with a telescoping flange 12 entering the mouthof the bowl and forming a seal joint therewith by means of an interposedrubber gasket 18, the cap being tightly clamped upon the bowl by meansof a feed tube 14 which is shouldered to engage the upper end of the capand which is threaded into a boss 15 in the bottom of the bowl as aclamping bolt. Through the feed tube the whole milk is admitted to theseparator bowl from the nozzle 16 of a stationary funnel which projectsinto its uper end, there being outlets for the milk into the lower partof the bowl by means of openings 17 in the feed tube and openings 18 inthe boss 15. The hollow shaft of this Specification of Letters Patent.

Application led January 2l, 1999.

Patented May 24, 1910.

Serial No. 473,418.

invention lits around the feed tube and comprises a number of radialribs or wings 19, preferably three as shown, which at their upper endsconnect with a short tube 2O and at their outwardly bent lower endsconnect with a base 21 of a hollow truncated cone shape. The base 21rests on the bottoni of the bowl 10 and one of the ribs has a shoulder22 which fits in a recess of the boss 15 to key the hollow shaft to thebowl, while a notch 28 in the top of the tube 20 serves a similarpurpose by fitting on a lug 24 of the cap 11, thus assuring the partsbeing assembled each time in the same relative positions to preserve theexact balancing `of the separator bowl.

The frusto-conical sheet metal disks 25 are assembled one above theother on the hollow shaft, being provided with notches extending fromtheir central openings to receive the ribs 19, and being spaced apart inany suitable manner to provide declining separating spaces between them.Through these spaces the separation of the liquid is accomplished bycentrifugal action, the lighter port-ion, the cream, passing upwardly atthe middle portion of the bowl, around the feed tube 14 and between theribs 19 to discharge through an opening 26 in the cap 11 while theheavier portion, the skimmed milk, is driven outwardly to the walls ofthe bowl from which it travels upwardly through a tube 27 and outthrough an opening 28. One of the ribs 19 is provided with a flange 29to form a key to fit in keyhways of the separator disks and assure theirbeing assembled in the same relative positions on the hollow shaft.

By means of the hollow shaft with the radial ribs, as constructed underthe present invention, there are no diflicult places for cleaning, allparts being freely accessible, particularly the intermediate portionconsisting of the ribs only. The ribs are so spaced that the cleaningclot-h may be entered between them to reach every part thereof withoutthe least difficulty. The tubular portion 2O is so short that it isentirely within reach of the cleaning cloth and may be quickly andeasily cleaned as well as the conical base.

Aside from the feature of the hollow shaft being readily cleanable theradial ribs thereof serve as wings for giving the circular motion of theb owl to the milk as it is discharged from the openings of the feed tubeand thus more quickly set it in action.

What I claim as my invention is;

In a centrifugal separator, a hollow shaft comprising radially arrangedribs with outwardly bent lower ends, a frusto-conical base mounted onthe outwardly bent ends of the ribs, a bowl in which the outer edge ofthe base is seated to form a pocket therein for collecting impuritiesfrom the liquid, a tube Connecting the upper ends of the ribs, a boss inthe bottom of the bowl, a feed tube eXtending down between the ribs andfitting in the boss, there being passageways through the boss leadingfrom the feed tube to the pocket within the .base and there being aspace between the upper edge of the base and the feed tube through whichthe liquid may pass between the ribs, a projection on one of the ribsengaging the boss for keying the hollow shaft to the bowl, and separatordisks mounted on the ribs and spaced thereby from the feed tube toreceive the liquid passing between the ribs and between the upper edgeof the base and the feed tube.

In testimony whereof, I affix my signature, in presence of twowitnesses.

CHARLES H. SI-IAV.

ANNA F. SCHMIDTBAUER.

